The last couple days I had a really strange behavior from the detector. When I ground balanced and started my hunt the detector was so smooth and quiet steady threshold no false signals but soon I realized that it was n't giving a tone for almost nothing 2'' deep. But it could pick up things with AM when I was pinpointing. Rx gain 13 Dis- 85 AM 75. excepting All targets. I don't want make it hard for people here but the questions is if it was something wrong would that be the Gbalance? GB locktrack ON Did I Gbalance on a coin or something?